added belongs to and has one tests

test/backends/SessionInsertHasManyToManyTest.cpp

@@ -30,6 +30,10 @@ struct ingredient_pk_generator {
   : name(std::move(name)) {
   }
 
+  ingredient_pk_generator(std::string name, std::vector<object_ptr<recipe_pk_generator<PkAttribute>>> recps)
+  : name(std::move(name))
+  , recipes(std::move(recps)){}
+
   template<class Operator>
   void process(Operator &op) {
     namespace field = matador::access;
@@ -51,8 +55,7 @@ struct recipe_pk_generator {
   }
   recipe_pk_generator(std::string name, std::vector<object_ptr<ingredient_pk_generator<PkAttribute>>> ings)
   : name(std::move(name))
-  , ingredients(std::move(ings)){
-  }
+  , ingredients(std::move(ings)){}
 
   template<class Operator>
   void process(Operator &op) {
@@ -218,3 +221,43 @@ TEST_CASE_METHOD(SessionFixture, "Test insert object with has many to many relat
   REQUIRE(ing_result.is_ok());
   REQUIRE(ing_result.value()->recipes.size() == 2);
 }
+
+TEST_CASE_METHOD(SessionFixture, "Test insert object with has many to many relation sequence reverse", "[session][insert][sequence][has_many_to_many][reverse]") {
+  auto result = schema.attach<recipe_sequence>("recipes")
+    .and_then( [this] { return schema.attach<ingredient_sequence>("ingredients"); } )
+    .and_then([this] { return schema.create(db); } );
+
+  query::session ses({bus, connection::dns, 4}, schema);
+
+  std::vector recipes {
+    make_object<recipe_sequence>("Apple Pie"),
+    make_object<recipe_sequence>("Strawberry Cake"),
+    make_object<recipe_sequence>("Pineapple Pie")
+  };
+
+  std::vector ingredients {
+    make_object<ingredient_sequence>("Apple", std::vector{recipes[0], recipes[2]}),
+    make_object<ingredient_sequence>("Strawberry", std::vector{recipes[2]}),
+    make_object<ingredient_sequence>("Pineapple", std::vector{recipes[2]}),
+    make_object<ingredient_sequence>("Sugar", std::vector{recipes[0]}),
+    make_object<ingredient_sequence>("Flour", std::vector{recipes[0]}),
+    make_object<ingredient_sequence>("Butter", std::vector{recipes[1]}),
+    make_object<ingredient_sequence>("Beans", std::vector{recipes[1]})
+  };
+
+  for (auto &i: ingredients) {
+    REQUIRE(i.is_transient());
+    auto res = ses.insert(i);
+    REQUIRE(res.is_ok());
+    REQUIRE(res->is_persistent());
+  }
+
+  auto recipe_result = ses.find<ingredient_sequence>(1);
+  REQUIRE(recipe_result.is_ok());
+  REQUIRE(recipe_result->is_persistent());
+  REQUIRE(recipe_result.value()->recipes.size() == 2);
+
+  const auto ing_result = ses.find<recipe_sequence>(recipes[0]->id);
+  REQUIRE(ing_result.is_ok());
+  REQUIRE(ing_result.value()->ingredients.size() == 3);
+}